One Click Install Koha

When I try to install Koha via the one click install I arrive at an error message that goes thus:
An error occurred while initialising the software repository.
Details 20081028-162234:
Valid metadata not found at specified URL(s)

  • cannot determine type for repository 20081028-162234

I know very little about computers but can someone explain to me if this is something I am doing wrong or is it a bug in the system?
I would dearly love to install koha on my computer and this is frustrating.
With every best wish,

Did you try it from THIS PAGE?

That’s precisely where I tried to install from. Just tried again and there is the same problem.